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Reading Room :: Theses 1997
Siree Nasakul's report
by
Siree Nasakul, MSE
University of Texas at Austin, 1997
Supervisor: Dr. M.M. Sharma
Existing methods for water control do not achieve our basic objective
of reducing the permeability to water while leaving the gas permeability
unaltered. We propose the use of polymerizable spreading thin film (PSTF)
as a novel method for water shutoff in gas wells, It is known that fluids
with positive spreading coefficients will spread spontaneously at a gas-water
interface We propose placing such a film at the gas-water interface and
polymerizing or gelling it in-situ. In regions of finite gas saturation
(through which gas is flowing) this will lead to solid films being formed
around the water that is present as pendular rings and in smaller pores
and crevices. The thin solid films will be stable over extended periods
of time under a wide range of pH salinity, temperature, and flow conditions.
Freezing or isolating the water in this manner will significantly reduce
its ability to flow. The permeability to gas will remain unchanged because
the pores containing gas will not be affected.
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